665484928320 has 56 divisors (see below), whose sum is σ = 2112914650464. Its totient is φ = 177462647296.

The previous prime is 665484928319. The next prime is 665484928331. The reversal of 665484928320 is 23829484566.

665484928320 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346605774 + ... + 346607693.

Almost surely, 2^665484928320 is an apocalyptic number.

665484928320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665484928320 is an abundant number, since it is smaller than the sum of its proper divisors (1447429722144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665484928320 is a wasteful number, since it uses less digits than its factorization.

665484928320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693213487 (or 693213477 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 57.

The spelling of 665484928320 in words is "six hundred sixty-five billion, four hundred eighty-four million, nine hundred twenty-eight thousand, three hundred twenty".